The book of Joshua marks the transition from the leadership of Moses to that of Joshua.
The promises of God given to the Patriarchs and to Moses are about to be fulfilled. There is an air of expectation and excitement, a new beginning for the people, long homeless and dispossessed.
The primary purpose of the book is to describe Israel's entry into the land of promise, the conquest of the land and its division among the tribes. Underlining all the stories of conquest throughout the book is God's continued faithfulness to His covenant promises.